CN114241861B - Heat expansion and cold contraction demonstration teaching aid - Google Patents
Heat expansion and cold contraction demonstration teaching aid Download PDFInfo
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- CN114241861B CN114241861B CN202111453113.3A CN202111453113A CN114241861B CN 114241861 B CN114241861 B CN 114241861B CN 202111453113 A CN202111453113 A CN 202111453113A CN 114241861 B CN114241861 B CN 114241861B
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- storage part
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- pressure valve
- water inlet
- water outlet
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- 230000008602 contraction Effects 0.000 title claims abstract description 21
- 239000007788 liquid Substances 0.000 claims abstract description 47
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 239000003086 colorant Substances 0.000 claims abstract description 17
- 239000012780 transparent material Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 67
- 238000005192 partition Methods 0.000 claims description 10
- 238000005303 weighing Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 abstract description 4
- 230000008447 perception Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/06—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for physics
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Mathematical Analysis (AREA)
- Mathematical Optimization (AREA)
- Algebra (AREA)
- Pure & Applied Mathematics (AREA)
- Mathematical Physics (AREA)
- Computational Mathematics (AREA)
- Educational Administration (AREA)
- Educational Technology (AREA)
- Theoretical Computer Science (AREA)
- Temperature-Responsive Valves (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a heat expansion and cold contraction demonstration teaching aid, which belongs to a teaching aid, wherein a shell is made of a transparent material, a baffle plate is fixed on the shell and divides the shell into a first storage part and a second storage part, the first storage part and the second storage part respectively store liquids with different colors, a heating device heats the liquids in the first storage part, the first storage part is communicated with the second storage part through a pressure valve, the pressure valve is opened by increasing the pressure after the liquids in the first storage part are heated, the liquids in the first storage part fall into the second storage part, the result caused by heat expansion can be obviously observed, and due to different colors of the liquids in the first storage part and the second storage part, the dripping of the liquids in the first storage part is more obvious, meanwhile, the process of mutually fusing different colors can be observed, and the perception of students on the colors is further enhanced, and the understanding of color harmony is further enhanced.
Description
Technical Field
The invention relates to a teaching aid, in particular to a demonstration teaching aid for thermal expansion and cold contraction.
Background
In middle and primary schools, the teaching involves expansion with heat and contraction with cold, and generally refers to that under the condition that the external pressure is unchanged, most substances increase in volume when the temperature is increased, and decrease in volume when the temperature is reduced. At present, due to the lack of a special demonstration teaching aid, most students stay in theoretical teaching in the teaching process, no matched experimental equipment exists, students cannot practice in person, the principle of thermal expansion and cold contraction and the result cannot be relatively intuitively experienced, and the learning effect of the students is affected to a certain extent.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide a thermal expansion and cold contraction demonstration teaching aid capable of directly observing and physically practicing, which is convenient for students to know the thermal expansion and cold contraction principle and result and improves the teaching quality.
One of the purposes of the invention is realized by adopting the following technical scheme:
the utility model provides a thermal expansion and shrinkage demonstration teaching aid, includes the water tank, the water tank includes shell and baffle, the shell is made by transparent material, the baffle be fixed in the shell and with first storage portion and second storage portion are separated into to the shell, first storage portion and second storage portion store the liquid of different colours respectively, thermal expansion and shrinkage demonstration teaching aid still includes pressure valve and heating device, heating device install in the first storage portion and can with liquid heating in the first storage portion, pressure valve install in the baffle, the apopore of pressure valve with first storage portion intercommunication, the apopore of pressure valve with second storage portion intercommunication, pressure increase makes after the liquid heating in the first storage portion pressure valve opens, liquid in the first storage portion passes through pressure valve entering second storage portion with liquid mixing in the second storage portion and colour change.
Further, the heating device is a heating pipe, the heating pipe surrounds the periphery of the first storage part, the heating device is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively communicated with two ends of the heating pipe, and hot water flows into the heating pipe through the water inlet to heat liquid in the first storage part.
Further, the water inlet and the water outlet are located at different horizontal heights, and the water inlet is lower than the water outlet.
Further, the heating device is a resistance wire heater which is fixed on the top of the first storage part and is separated from the liquid in the first storage part by air.
Further, the thermal expansion and contraction demonstration teaching aid further comprises a temperature measuring device, and the temperature measuring device is fixed to the first storage portion and is in contact with liquid in the first storage portion.
Further, the thermal expansion and contraction demonstration teaching aid further comprises a weighing device, and the weighing device is arranged on the partition plate to weigh the mass of the liquid in the first storage portion.
Further, the thermal expansion and contraction demonstration teaching aid further comprises a water outlet, and the water outlet is arranged at the bottom of the second storage part.
Further, the pressure valve comprises a valve body, the water inlet hole and the water outlet hole are formed in the valve body, and the axis of the water inlet hole is perpendicular to the axis of the water outlet hole.
Further, the pressure valve further comprises a valve seat, a plug and an elastic piece, wherein the valve seat is installed on the valve body, the end part of the elastic piece is fixed on the valve seat, and the plug is located on the elastic piece.
Further, the plug is spherical, and the diameter of the plug is larger than that of the water inlet hole.
Compared with the prior art, the shell of the heat expansion and cold contraction demonstration teaching aid is made of transparent materials, the partition plate is fixed on the shell and divides the shell into the first storage part and the second storage part, the first storage part and the second storage part respectively store liquids with different colors, the heating device is arranged in the first storage part and can heat the liquids in the first storage part, the pressure valve is arranged on the partition plate, the water inlet hole of the pressure valve is communicated with the first storage part, the water outlet hole of the pressure valve is communicated with the second storage part, the pressure valve is opened by pressure increase after the liquids in the first storage part are heated, the liquids in the first storage part enter the second storage part through the pressure valve and are mixed with the liquids in the second storage part and change in color, through the design, after the temperature of the liquids in the first storage part is increased, the pressure of the first storage part is increased, the opening pressure of the pressure valve is reached, the liquids in the first storage part fall into the second storage part, the result brought by heat expansion is obviously observed, and the different colors of the first storage part and the students can be further perceived by different colors, and the students can further know the different colors by further observing the different colors.
Drawings
FIG. 1 is a perspective view of a heat expansion and cold contraction demonstration teaching aid of the invention;
FIG. 2 is a cross-sectional view of the expansion and contraction demonstration teaching aid of FIG. 1;
fig. 3 is a schematic structural view of the pressure valve of fig. 2. .
In the figure: 10. a bracket; 20. a water tank; 21. a housing; 22. a partition plate; 23. a first storage unit; 24. a second storage unit; 25. a heating device; 250. a water inlet; 251. a water outlet; 30. a temperature measuring device; 40. a weighing device; 50. a pressure valve; 51. a valve body; 510. a water inlet hole; 511. a water outlet hole; 52. a valve seat; 53. a plug; 54. an elastic member; 60. and a water outlet.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or be present as another intermediate element through which the element is fixed. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
Fig. 1 to 3 show a heat expansion and cold contraction demonstration teaching aid according to the present invention, which includes a bracket 10, a water tank 20, a temperature measuring device 30, a weighing device 40, a pressure valve 50, and a water outlet 60.
The water tank 20 is mounted to the bracket 10.
The water tank 20 includes a housing 21 and a partition 22. The housing 21 is made of a transparent material. The partition 22 is fixed inside the housing 21 and partitions the housing 21 into a first storage portion 23 and a second storage portion 24. The first storage portion 23 is located above the second storage portion 24. The first storage portion 23 and the second storage portion 24 are respectively for storing liquids of different colors. By adopting different colors of liquid, on one hand, the liquid in the first storage part 23 can be more obvious when falling into the second storage part 24; on the other hand, students can simultaneously know the process and the result of different color fusion, and the perception of the colors by the students and the understanding of the color harmony are further enhanced. In this embodiment, the liquid is water.
A heating device 25 is mounted in the first storage portion 23 for heating the liquid in the first storage portion 23. Specifically, in the present embodiment, the heating device 25 is a heating tube, and the heating tube uniformly surrounds the side portion of the first storage portion 23. The heating device 25 is provided with a water inlet 250 and a water outlet 251, and the water inlet 250 and the water outlet 251 are respectively communicated with two ends of the heating pipe. The water inlet 250 and the water outlet 251 are located at different levels. Specifically, the water inlet 250 is located below the water outlet 251. By the design, hot water can pass through the bottom of the first storage part 23, so that liquid at the bottom of the first storage part 23 is heated first, and the liquid is heated more uniformly. In other embodiments, the heating device 25 is a resistance wire heater. The resistance wire heater is fixed to the top of the first storage part 23 and is separated from the liquid in the first storage part 23 by air.
The temperature measuring device 30 is fixed on the first storage portion 23, and the temperature measuring device 30 is used for measuring the temperature of the liquid in the first storage portion 23, so that students can calculate the influence of the temperature rise on the volume according to the temperature and the opening pressure of the pressure valve 50.
The weighing device 40 is installed on the partition 22, and the weighing device 40 is used for weighing the weight of the liquid in the first storage part 23, so that students can obtain the mass parts of the two liquids when the liquids with different colors are fused into the specific color according to the weight of the residual liquid in the first storage part 23.
The pressure valve 50 is attached to the diaphragm 22, and the first reservoir portion 23 communicates with the second reservoir portion 24 through the pressure valve 50. The pressure valve 50 includes a valve body 51, a valve seat 52, a plug 53, and an elastic member 54. The valve body 51 is provided with a water inlet 510 and a water outlet 511. The axis of the water inlet 510 is perpendicular to the axis of the water outlet 511. The valve seat 52 is mounted to the valve body 51. The end of the elastic member 54 is fixed to the valve seat 52, and the plug 53 is located at the other end of the elastic member 54. Specifically, the plug 53 is spherical, and the diameter of the plug 53 is larger than the diameter of the water inlet 510. The elastic member 54 is a spring.
A drain 60 is provided at the bottom of the second storage portion 24, and the drain 60 is used to drain the mixed liquid.
When the demonstration teaching aid for thermal expansion and contraction is used, the heating device 25 heats the liquid in the first storage part 23, so that the liquid in the first storage part 23 is heated and expanded, and the pressure in the first storage part 23 is increased until the opening pressure of the pressure valve 50 is reached. The plug 53 of the pressure valve 50 moves downward to communicate the water inlet 510 with the water outlet 511. The liquid in the first storage portion 23 is retained in the second storage portion 24 by the pressure valve 50. Since the first storage portion 23 and the second storage portion 24 are different in color, the liquid in the first storage portion 23 drops more remarkably, and the result of thermal expansion can be clearly observed. Meanwhile, the process of mutually fusing different colors can be observed, so that the perception of the colors by students is further enhanced, and the understanding of color harmony is deepened.
The foregoing examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that, for those skilled in the art, it is possible to make several modifications and improvements without departing from the concept of the present invention, which are equivalent to the above embodiments according to the essential technology of the present invention, and these are all included in the protection scope of the present invention.
Claims (3)
1. The utility model provides an expend with heat and contract with cold demonstration teaching aid, includes water tank, its characterized in that: the water tank comprises a shell and a baffle plate, wherein the shell is made of transparent materials, the baffle plate is fixed on the shell and divides the shell into a first storage part and a second storage part, the first storage part and the second storage part respectively store liquids with different colors, the expansion and contraction demonstration teaching aid further comprises a pressure valve and a heating device, the heating device is a heating pipe, the heating pipe surrounds the periphery of the first storage part, the heating device is provided with a water inlet and a water outlet, the water inlet is lower than the water outlet, the water inlet and the water outlet are respectively communicated with two ends of the heating pipe, hot water flows into the heating pipe through the water inlet to heat the liquid in the first storage part, the heating device is arranged in the first storage part, the pressure valve comprises a valve body, a valve seat, a plug and an elastic piece, the pressure valve is arranged on the partition board, a water inlet hole of the pressure valve is communicated with the first storage part, a water outlet hole of the pressure valve is communicated with the second storage part, the water inlet hole and the water outlet hole are arranged on the valve body, the axis of the water inlet hole is vertical to the axis of the water outlet hole, the valve seat is arranged on the valve body, the end part of the elastic piece is fixed on the valve seat, the plug is arranged on the elastic piece, the plug is spherical, the diameter of the plug is larger than the diameter of the water inlet hole, the pressure is increased after the liquid in the first storage part is heated to enable the pressure valve to be opened, the liquid in the first storage part enters the second storage part through the pressure valve to be mixed with the liquid in the second storage part and the color is changed, the thermal expansion demonstration teaching aid further comprises a weighing device, the weighing device is mounted on the partition plate to weigh the liquid in the first storage portion.
2. The expansion and contraction demonstration teaching aid according to claim 1, wherein: the thermal expansion and contraction demonstration teaching aid further comprises a temperature measuring device, and the temperature measuring device is fixed to the first storage portion and is in contact with liquid in the first storage portion.
3. The expansion and contraction demonstration teaching aid according to claim 1, wherein: the expansion and contraction demonstration teaching aid further comprises a water outlet, and the water outlet is arranged at the bottom of the second storage part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453113.3A CN114241861B (en) | 2021-11-30 | 2021-11-30 | Heat expansion and cold contraction demonstration teaching aid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111453113.3A CN114241861B (en) | 2021-11-30 | 2021-11-30 | Heat expansion and cold contraction demonstration teaching aid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114241861A CN114241861A (en) | 2022-03-25 |
| CN114241861B true CN114241861B (en) | 2024-04-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111453113.3A Active CN114241861B (en) | 2021-11-30 | 2021-11-30 | Heat expansion and cold contraction demonstration teaching aid |
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| Country | Link |
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| CN (1) | CN114241861B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115100929B (en) * | 2022-07-07 | 2023-10-27 | 淮阴工学院 | Air expansion teaching demonstration equipment for physical experiment |
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| KR200439990Y1 (en) * | 2007-03-27 | 2008-05-19 | 한양대학교 산학협력단 | Instrument for learning a thermal expansion using bimetal |
| CN201570155U (en) * | 2009-12-17 | 2010-09-01 | 朱学芹 | Teaching demonstration teaching aid |
| CN202547093U (en) * | 2012-04-20 | 2012-11-21 | 中国建筑西南设计研究院有限公司 | Heating water tank for water source heat pump |
| CN207441082U (en) * | 2017-09-07 | 2018-06-01 | 深圳科学高中 | A kind of gas with various expanded by heating apparatus for demonstrating |
| CN109147508A (en) * | 2018-09-17 | 2019-01-04 | 胡兴源 | One kind is expanded with heat and contract with cold and pyrocondensation cold expanding experimental demonstration device |
| CN208610598U (en) * | 2017-08-17 | 2019-03-19 | 应治国 | Coffee machine |
| CN113421666A (en) * | 2021-07-01 | 2021-09-21 | 上海核工程研究设计院有限公司 | Advanced reactor core water supplementing tank design for passively adjusting flow |
-
2021
- 2021-11-30 CN CN202111453113.3A patent/CN114241861B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200439990Y1 (en) * | 2007-03-27 | 2008-05-19 | 한양대학교 산학협력단 | Instrument for learning a thermal expansion using bimetal |
| CN201570155U (en) * | 2009-12-17 | 2010-09-01 | 朱学芹 | Teaching demonstration teaching aid |
| CN202547093U (en) * | 2012-04-20 | 2012-11-21 | 中国建筑西南设计研究院有限公司 | Heating water tank for water source heat pump |
| CN208610598U (en) * | 2017-08-17 | 2019-03-19 | 应治国 | Coffee machine |
| CN207441082U (en) * | 2017-09-07 | 2018-06-01 | 深圳科学高中 | A kind of gas with various expanded by heating apparatus for demonstrating |
| CN109147508A (en) * | 2018-09-17 | 2019-01-04 | 胡兴源 | One kind is expanded with heat and contract with cold and pyrocondensation cold expanding experimental demonstration device |
| CN113421666A (en) * | 2021-07-01 | 2021-09-21 | 上海核工程研究设计院有限公司 | Advanced reactor core water supplementing tank design for passively adjusting flow |
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| CN114241861A (en) | 2022-03-25 |
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